Safety tether



FIG. 1 is a top plan view of our design for a safety tether;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a top perspective view thereof;

FIG. 4 is a cross-sectional view thereof taken along lines 4-4 in FIG. 1;

FIG. 5 is a left side view thereof; and,

FIG. 6 is an inverted right side view thereof. 

CLAIM The ornamental design for a safety tether, as shown and described. 